Manuals / Hoshizaki / Kitchen Appliance / Ice Maker

Hoshizaki MWH(-M), MRH/3 b KM-650MAH, KM-650MWH, KM-901MAH, KM-901MWH, Control utputO, Psig

Models: KM-320MAH MRH KM-600MAH KM-650MAH MWH(-M) MRH KM-901MAH MRH/3 MWH KM-515MAH MWH

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b) KM-650MAH, KM-650MWH, KM-901MAH, KM-901MWH

b) KM-650MAH, KM-650MWH, KM-901MAH, KM-901MWH
Transformer 10.5V at 115V	Switch	ModelCooled-Water	384±22	PSIG284±22
Control utputO	Switch	ModelCooled-Water	384±22	PSIG284±22
			PSIG
			0
	High* -Pressure	Cooled-Air Model	412±22	327±22PSIG
			PSIG
			0
*			-out	-in
			Cut	Cut
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Hoshizaki MWH(-M), MWH KM-515MAH, MRH/3, MRH KM-901MAH b KM-650MAH, KM-650MWH, KM-901MAH, KM-901MWH, Control utputO, Psig

Contents

SERVICE MANUAL Modular Crescent CuberModels KM-320MAH, MWH HoshizakiHoshizaki America, IncComplete and detailed explanation of the problem Phone 1-800-233-1940 770 Fax 1-800-843-1056 770E-mail techsupport@hoshizaki.com HOSHIZAKI AMERICA, INC 618 Highway 74 South Peachtree City, GACONTENTS 5. Bin Control Selector or Harvest Pump Timer Operation S4 dip switch 6. Factory Use S4 dip switch7. Freeze Timer S4 dip switch 9 8. Float Switch Selector S5 dip switch 1 G Control BoardC. Wiring Diagrams 1. Diagrams Without Harvest Pump Timer Relays2. Diagrams With Harvest Pump Timer Relays a KM-320MH, KM-515MH, KM-600MAHImportant Safety Information Indicates a hazardous situation which could result in death orserious injury Indicates a situation which could result in damage to theWARNING, continued Additional Warning for Remote ModelsA. Construction I. Construction and Water/Refrigeration Circuit Diagram1. Air-Cooled Models MAH 2. Water-Cooled Models MWH-M Model Shown KM-515MWH3. Remote Models MRH/3 Spray Tubes Inlet Water Valve Cleaning Valve Control SwitchThermostatic Bin Control Float Switch Water Pump Compressor Thermostatic Bin Control Bracket & Bulb HolderB. Water/Refrigeration Circuit Diagram 1. Air-Cooled Models MAHDischarge Line 2. Water-Cooled Models MWH-MFreeze Pump Out 3. Remote Models MRH/3 Freeze Pump- OutA. Sequence of Operation Flow Chart E and G Control Board Without Harvest Pump Timer Operation Flow ChartII. Sequence of Operation and ServiceDiagnosis Components Energized when the Control Switch is in the WASH PositionThermostatic Bin Control Shutdown Sequence Flow Chart Mechanical Bin Control Shutdown Sequence Flow ChartShutdown Delay 1. Bin FullG Control Board With Harvest Pump Timer Operation Sequence Flow Chart 2. G Control Board with Harvest PumpTimer Operation Components Energized when the Control Switch is in the WASH PositionB. Service Diagnosis 1. E and G Control Board without Harvest Pump Timer Diagnosis If energized, replace CB. If de-energized and bypassing, replace LLV a Freeze Cycle Diagnosis Confirm Comp and FMR continue. Confirm that For LLV, check coil voltage and continuity CB K1 #5 DBU to neutral W. If 115VAC is not present, replace CB 9 Shutdown a E Control Board Thermostatic Bin Control TBC b Mechanical Bin Control2. G Control Board with Harvest Pump Timer Diagnosis 50 sec. before harvest terminates, PM energizes. See step 5b below d WRV Diagnosis Confirm WRV is not leaking byPage For LLV, check coil voltage and continuity G Control Board Settings S4 Dip Switch SettingPump-Out G Control Board9 Shutdown Mechanical Bin Control C. Control Board Check D. Bin Control Check 1. Thermostatic Bin Control Check4 Check MBC wire harness connections. See Fig 5 Disconnect MBC connector from CB K4 connector9 Check that CB green BC CLOSED LED is on Legend MBC-mechanical bin control CB-control boardb Mechanical Bin Control Cleaning E. Float Switch Check and Cleaning 1. Float Switch CheckVent Flush Shaft Float Switch Housing Float Retainer Rod Rubber Boot 2. Float Switch Cleaningand Hose F. Thermistor Check 1. No Ice Production G. Diagnostic TablesNo Ice Production - Possible Cause 2. Freeze-Up No Ice Production - Possible CauseFreeze-Up - Possible Cause Harvest Cycle3. Low Ice Production Freeze-Up - Possible CauseFreeze Cycle Low Ice Production - Possible CauseLow Ice Production - Possible Cause Long Freeze CycleIII. Controls and Adjustments A. Control Board Layout E Control Board1. E Control Board E Control BoardG Control Board 2. G Control BoardG Control Board Part Number 2A3792-01B. LED Lights and Audible Alarm Safeties 1. E Control Board2. G Control Board C. Settings and Adjustments 1. Default Dip Switch Settingsa E and G Control Board without Harvest Pump Timer Operation b G Control Board with Harvest Pump Timer Operation2. Harvest Timer S4 dip switch 1 3. Pump-Out Timer S4 dip switch 34. Pump-Out Frequency Control S4 dip switch 5 1 Bin Control Selector, E Control Board6. Factory Use S4 dip switch 2 Harvest Pump Timer, G Control Board7. Freeze Timer S4 dip switch 9 8. Float Switch Selector S5 dip switch 1 G Control Board D. Control Switch9. Refill Counter S5 dip switch 2 through 5 G Control Board A. Refrigeration Circuit Service Information IV. Refrigeration Circuit and Component Service Information1. Refrigerant Recovery 2. Brazing 3. Evacuation and Recharge R-404A10 Cap the refrigerant access valves to prevent a possible leak B. Component Service Information C. Water Regulating Valve Adjustment water-cooled modelV. Maintenance 1. Remove the water from the icemaker water line VI. Preparing the Appliance for Periods of Non-Use2. Remove the water from the water tank 6 Close the drain valves VII. Disposal 1. KM-320MAH VIII. Technical Information A. Specification Sheetsdesign 2. KM-320MWH design without3. KM-515MAH Note We reserve the right to make changes in specifications andwithout prior design4. KM-515MWH Note We reserve the right to make changes in specificationsand design without prior5. KM-515MRH 6. KM-600MAH Note We reserve the right to make changes in specificationsand design without prior7. KM-650MAH Note We reserve the right to make changes in specifications andwithout prior designNote We reserve the right to make changes in specifications 8. KM-650MWHand design without prior AWAITING DATA 9. KM-650MWH-M10. KM-650MRH Note We reserve the right to make changes in specificationsand design without prior11. KM-901MAH design12. KM-901MWH Note We reserve the right to make changes in specificationsand design without prior13. KM-901MRH without prior14. KM-901MRH3 without priorB. Performance Data 1. KM-320MAHAMBIENT TEMP kg./day2. KM-320MWH 3. KM-515MAH 4. KM-515MWH 5. KM-515MRH 6. KM-600MAH 7. KM-650MAH 8. KM-650MWH AWAITING DATA 9. KM-650MWH-M10. KM-650MRH 11. KM-901MAH 12. KM-901MWH 13. KM-901MRH 14. KM-901MRH3 1. Diagrams Without Harvest Pump Timer Relays C. Wiring Diagramsa KM-320MH, KM-515MH, KM-600MAH Control utputO b KM-650MAH, KM-650MWH, KM-901MAH, KM-901MWHPSIG c KM-650MRH, KM-901MRH PressureSwitchTransformer 10.5V at115V Control Outputd KM-901MRH3 High-Pressure SwitchControl Transformer Output 10.5V at Cut-out2. Diagrams With Harvest Pump Timer Relays a KM-515MAHOutput C ontrolb KM-650MAH, KM-650MWH, KM 901MAHControl Transformer Output 10.5V atc KM-650MWH-M Control Transformer Output 10.5V at High-Pressure SwitchCut-out 384±High-Pressure Switch d KM-650MRHControl Transformer Output 10.5V at